Gas-washer.



No. 844,312. PATENTED FEB. 19,, 1907.

F. B. BAGHMAN. GAS WASHER.

: ABPLIGATIOH FILED JAN. 27, 1905. 6 SHEETS-SHEET 1.

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No. 844,312. PATENTED FEB. 19, 1907.

F. E. BACHMAN.

GAS WA8HER.

IAPPLIOATION FILED JAN. 27, 1905.

6 SHEETS-SHEET 2.

No. 844,312.- PATENTED FEB. 19, 1907. I

" F. E. BAGHMAN.

GAS WASHER. -A PPLIOATION FILED umz'i, 1905,.

6' SHBETSSHEET 3.

wrrnassss mvsn-ron .No. 844,312.' PATENTBD FEB. 19, 1907.

F. E. BAGHMAN. GAS WASHER.

APPLICATION FILED 'JAN.-27, 1905.

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No. 844,312. PATENTED FEB. 19, 1907.

I F. E. BAGHMAN.

GAS WASHER. APPLICATION PILED JAN. 27, 1905.

6 SEEBTSSI IEBT 5.

INVENTOR WITNESSES No. 844,312. PATENTED FEB. '19, 1907.

1 .3. BAGHMAN.

GASWASHER. v APPLICATION FILED JAN. 27, 1905.

. l 6 SHEETS-SHEET 8.

INYENTOR wrfussszS UNITED STATES PATENT OFFICE.

GAS-WASHER.

Specification of. Letters Patent.

Application filed January 27, 1905. Serial No. 242,947.

To all whom it nmyponcern:

Be it known that I, FRANK E. BAOHMAN, of Port Henry, Essex county, New York, have invented a new and useful Gas-Washer, of which the following is a full, clear, and exact description, reference being had to the accompany' g drawings, forming part of this specification, in which Figure 1 is a side elevation showing one form of my improved gas-washer. Fig. 2 is a central vertical section of thesame. Fig. 3 is a top plan view. Fig. 4 is a detail view of the spiral shelf. Fig. 5 is a sectional side ele-= vation of a modified form, showing a gaswasher and its connections. Fig. 6 is a vertical central section showing amodified and simpler form.' Fig. 7 is a cross-section of Fig. 6, and Figs. 8 and 9 are views similar to Figs. 6 and 7, respectively, showing another form of the invention.

My invention relates to apparatus for separating dust from gases, and is designed to provide a simple and 'efficient apparatus of this character by which the dust will be thrown outwardly by centrifugal force against a wall, from which it is washed down.

The invention consists in apparatus whereby the gas is given a rotary path, spray-pipes being used for washing the deposited dust from the casing on which the dust is deposited by centrifugal action.

The invention further. consists in the pre ferred'form in giving the gas a spiral path,

' the spray-pipes being used to wash the dust both from the spiral shelf and the casing.

It also consists in the construction and arrangemehtof the parts, ashereinafter more fully described and claimed.

In the -"drawings, referring to the form of Figs. 1 to 4, 2 represents an outer cylindrical vertical shell or casing having a bottom portion 3, which is preferably of cone shape and terminates in a pipe or channel 4, entering a water-sealing trough 5. The upper portion 6 of the casing is preferably of frustoconical shape, and from it extend downwardly two concentric shells 7 and-8. These shells terminate above the lower end of the casing and form concentric annular chambers 9 and 10. In each chamber a spiral shelf 11 is supported upon suitable arms 12, these shelves being slightly narrower than the width of the annular chambers, sothat' a narrow-spaceis left between their outer edges and the "walls of the chambers. The dust-laden gas enters conduit 13, which preferably leads in tang cn tially or non-radially, although this is not essential. located a partition or bafifle 14, which ex.- tends to the inner shell 7, thus compelling the entering gases to flow around the shells 7 and 8 in one direction and flow in a s 'iral path over the shells until they reach t eir lower ends. They then pass up within the inner shell 7 through the outlet-flue 15 to the outlet-port 16.

During the downward passage of the gases over the spiral shelves'the centrifugal action will cause the dust to deposit upon the outer walls and upon the shelves, and the dust is washed down from these surfaces by suitable water-spray pipes. In the form shown pipes 17 are arranged to throw water against shells 2, 7, and 8, and pipes 18 are arranged to spray water upon the spiral plates or shelves. order to more effectually retain the water uponthe shelves, I preferably provide them with longitudinal grooves or channels 19, as shown in the detailed cross-section of Fig. 4, the water flowing down along the spiral shelves through these channels. If it is desired to further wash the gases after they have reached the lower ends of the shelves, I may provide spray-pipes 20 within the central chamber or flue which supply a descending shower of water through the ascending current of gas, the water passing in the opposite direction to that of the gas. As the gas and water mix where they are coldest, if sufficient water is used to cool the gas, any steam which is formed is condensed, so that no Water-vapor is carried along by the gas to lower its efficiency. The various water-pipes are supplied with suitable valves, and the pipes for spraying the shells may have a plug-cock to provide for washing and clean- 8 and dropping on the spiral shelves. As all these surfaces are bathedwith water, the dust is immediately picked up and carried down and washed out of the device into the water seal, whence it passes through the sewer. Owing to the arrangement of the apparatus,

At one side of the inlet-channel is' Patented Feb. 19, 1907.

IIO

55 water-box is employed, as in F1gs. 6 and 7.

' the dust is removed with a small amount of only reduced to a small amount.

water,'s0 that the initial heat of the gas is The rosesprays in the ascending current of gas are not usually necessary, as [have found that the dust is very effectually removed in its downward passage over the shelves.

' The apparatus may be used without the central uptake, as in Fig. 5. In this form 2 is theouter shell, and-7f and 8 are inner shells, thegas passing in through the pipe 13'. In this case the gas after reaching the lower end of the shell 8 flows out from the bottom ofv the washer throughthe olltake 21.

In this figure Ishow a general arrangement of the Washer in connection with a .dustcatcher of a blast-furnace. In this case, 22 is the dust-catcher, into which the downcomer 23 from the blast-furnace leads. The pipe 13 leadsfrom the downcomer laterally innthe washer, and the oiftake 21, which in this case is at the bottom, leads into the gasmain 24, from which it is taken to the boilers casing 2 with a gas-admission pipe or channel 13 which enters its topin a tangential or non-radial direction. In this form I have shown the outlet-channel l5 -as extending down within the cylinder concentrically therewith. 25 is a perforated water-box. In this form the gas enters the top of the cylinder, swirls around in a rotary path in descending, so as to "throw the dust against the inner face of the casing-wall, and then flows upwardly through the central oiltake. The water flows down over the inner wall of phe casing and washes down the dust, as beore.

In the form of Figs. 8 and 9 I show the inlet-channel 13 as entering at the bottom'of the washer-casing 2 in a tangential direction. In this case the gas flows in a swirl or spiral path' hile ascending and passes out through the top outlet 15". In this case the 'The advantages of my inventions result 1 from the rotary path through which the gas flows, which effectually deposits the dust upon the walls of the passage, also from the washing down of the dust over these surfaces and thesrnall reduction in the initial heat of the gases owing'to the small amount of water Whichis necessary. In practice the a paratus is found to "remove thedust so e ci'ently that ther'ose-spr ys in the uptake,

where this suptake is used, are not found necessary where gas is cleaned for stoves or boilers. A

I have shown the gas as flowing through two concentric annular chambers provided with spiral 'shelves, where such spiral shelves are used; but one such annular chamber and shelf may be used or any desirable number of such chambers and shelves, and many other variations may be made in the form" and arrangement of the chamber, the means for washing down the dust, and the other parts without departing from my invention.

'1. In a gas-washer, a stationary cylindrical vertically-extending chamber, having an inlet and an outlet for the gas, means for directing the gas in a helical path through the chamber, and means for wetting the inner cylindrical wall of the chamber with-out spraying the gas; substantiallyes described. 2. In a gas-washer, a stationary cylin drical vertically-extending chamber, having an inlet and an outlet for the gas, means for directing the gas in a helical path through the chamber, and means adjacent the inner cyline drical wall of the chamber for wetting said wall without spraying the gas; substantially as described. l

3. In a gas-washer, an annular chamber having a stationary spiral shelf or path therein, connections arranged to pass dustd'aden gas through the chamber and over the spiral shelf, and means for wettingone cylindrical wall of the chamber with-out spraying the gas; substantially as'described.

4. In gaswashers, an annular chamber having a stationary spiral shelf therein, said chamber extending in a verticaldirection and having water-spray pipes in its upper portion arranged to. direct water against the outer wall'without spraying the gas, and means for passing gases downwardly through said chamber and over the shelf; substantially as described.

5. In a gas washer, an annular chamber having a spiral shelf extending from its inner wall to a point adjacent to its outer wall, and means for wetting the inner surface of the outer wall without spraying the gas; substantially as described. I

6. In a gas-washer, a plurality of annular chambers containing stationary spiral shelves and'an'ofitake-fiue formed by the inner wall of the inner annular chamber and arranged to lead the as in the opposite direction to that in the annular chambers; substantiallyas described.

7. In a gas-washer, an annular chamber rob containing a stationary-"spiral shelf, an bilitake-flue formed by the inner wall of the annular chamber and arranged to lead the gas inthe opposite direction tot-hat in the ahnd- 13o lar chamber, and means for wetting the in IIO men surface of the outer Wall of the chamber Without spraying the gas; substantially as described.

8. In a gas-Washer, an annular chamber containing a stationary spiral shelf, anofftake-flue formed by the inner Wall of the annula'r chamber and arranged to lead the gas 1n the opposite direction to that in the annular chamber, and means for Wetting the inner surface of the outer wall of the chamber; substantially as described.

9. In a gas washer, an annular chamber containing a stationary spiral shelf, an oiltake-flue within the annular chamber and arranged to lead the gas in theopposite direction to that in the annular chamber, and

, spray-pipesv in the annular chamber; substantially as described. 10. In a gas-Washer, an annular chamber [containing a stationary spiral shelf, an ofi'- take-flue Within the annular chamber and arranged to lead the gas in the opposite direction to that in the annular chamber, and spray-pipes in the annular chamber and the return-flue; substantially as described.

11. In a gasasher, a stationary vertically-extending cylindrical chamber having a gas-outlet, a gas-inlet therefor extending in a non-radial direction, and a Water-distribua ing device arranged to flow water over the inner surface of said casing; substantially as described. 4

In testimony, whereof I have hereunto set my hand. y

. FRANK E. BAOHMAN. Witnesses:

L. D. FRAUNFELDER, Q. I. GOBEL. 

